java - 无法解析 Room 依赖项

Question

我想将以下依赖项添加到我的项目中:

1.compile "android.arch.persistence.room:runtime:1.0.0"
2.annotationProcessor "android.arch.persistence.room:compiler:1.0.0"

但我的项目无法解析“:app@debug/compileClasspath”的依赖关系:无法解析 android.arch.persistence.room:runtime:1.0.0。 以下文本显示我的 build.gradle

apply plugin: 'com.android.application'

android {
 compileSdkVersion 27
 defaultConfig {
     applicationId "com.smm.room"
     minSdkVersion 17
     targetSdkVersion 27
     versionCode 1
     versionName "1.0"
     testInstrumentationRunner 
 "android.support.test.runner.AndroidJUnitRunner"
 }
 buildTypes {
     release {
         minifyEnabled false
         proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
     }
 }
}

dependencies {
 implementation fileTree(dir: 'libs', include: ['*.jar'])
 implementation 'com.android.support:appcompat-v7:27.1.1'
 implementation 'com.android.support.constraint:constraint-layout:1.1.2'
 testImplementation 'junit:junit:4.12'
 androidTestImplementation 'com.android.support.test:runner:1.0.2'
 androidTestImplementation 'com.android.support.test.espresso:espresso- 
core:3.0.2'

 compile "android.arch.persistence.room:runtime:1.0.0"
 annotationProcessor "android.arch.persistence.room:compiler:1.0.0"
}

Answer 1

将两者都更新到 1.1.1 版本，例如:

implementation "android.arch.persistence.room:runtime:1.1.1"
annotationProcessor "android.arch.persistence.room:compiler:1.1.1"

试试下面的代码:

apply plugin: 'com.android.application'

android {
    compileSdkVersion 27
    defaultConfig {
        applicationId "com.smm.room"
        minSdkVersion 17
        targetSdkVersion 27
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner
        "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'com.android.support:appcompat-v7:27.1.1'
    implementation 'com.android.support.constraint:constraint-layout:1.1.2'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.2'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'

    implementation "android.arch.persistence.room:runtime:1.1.1"
    annotationProcessor "android.arch.persistence.room:compiler:1.1.1"
}

你的项目宏伟应该是这样的:

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {

    repositories {
        google()
        jcenter()
        mavenCentral()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.1.3'
    }
}

allprojects {
    repositories {
        google()
        jcenter()
        mavenCentral()
    }
}